From the table particularly we can prove that A) Law of conservation of mass

Question

Element	Weight percentage
	Natural sample	Synthetic sample
Copper	51.35	51.35
Carbon	9.74	9.74
Oxygen	38.91	38.91

From the table particularly we can prove that 

A) Law of conservation of mass 

B) Law of constant proportions 

C) Law of conservation of energy 

D) Above all

Answer 1

B) Law of constant proportions